docs: def attach(self, gui):
          """Attach the view to the GUI."""
          super(FeatureView, self).attach(gui)
          self.actions.add(self.increase)
          self.actions.add(self.decrease)
          self.actions.separator()
          self.actions.add(self.clear_channels)
          self.actions.add(self.toggle_automatic_channel_selection)
  
          gui.connect_(self.on_channel_click)
          gui.connect_(self.on_request_split)